A line in a TIN that represents a distinct interruption in the slope of a surface, such as a ridge, road, or stream.

learn more… | top users | synonyms

0
votes
0answers
31 views

How to project 2D (poly)lines and polygons on a point cloud or a (tri)mesh (TIN)?

I'm searching a way to project 2D (break)lines and polygons (they are in an ESRI shapefile but I can translate them to something different if needed, like geojson for example) on a point cloud (seems ...
2
votes
1answer
79 views

How to break a closed line when intersect with polygon

I have a number of polygons (in lines shape) which represent the new condition of an area and a numder of polygons (in polygon shape) which represent the old condition of the same area. How can I ...
1
vote
0answers
203 views

How to include 3D break lines in QGIS raster interpolation

I wish to add a break line to an interpolation of a set of survey points to simulate an elevated ridge in the survey area. Using QGIS 2.6 on Windows 7. I have created a polyline shapefile with a ...
8
votes
1answer
595 views

River boundary (bank) extraction from LiDAR

Is there any way to extract a river boundary (bank) from LiDAR data and its products (DEM, intensity image and slope) automatically? Digitizing is very time consuming.
4
votes
1answer
87 views

Spatial interpolation with breaklines in R

I have a dataset consisting of irregularly-spaced points (x,y,value) that represent an area of ocean that contains some land. I need to interpolate these to a regular grid, ensuring that the ...
1
vote
2answers
765 views

Breaklines in QGIS interpolation plugin

How can I prepare data to generate a DTM using points and breaklines, but where every breakline has nodes at different heights. For example, a river valley, which regularly falls, or a dorsal line, ...
10
votes
3answers
1k views

How to extract breaklines from a given DEM?

Breaklines are very useful for describing a terrain - for example to build an exact TIN. My question is, how to extract these breaklines from a given DEM? I calculated the curvature (vertical) - ...